Bumped on an interesting article the other day: a cheap power amplifier with two MRF300AN LDmosfets from NXP.
The MRF300 produces about 300 watts @ 50V and operates broadband from 1.8 – 250 MHz. Razvan M0HZH created a little power amplifier with two of these mosfets which put out around 600 watt with 4.5 watt of drive power.
This is a really nice project which is going on my to-do list!
Last night I was fiddling around with my Elecraft K1. Couldn’t get it to work properly. Couldn’t even spot myself on Reverse Beacon Network. Eventually I got out my Kenwood TS-590. Turns out my home-brew coax patch-cable didn’t work! Aaaargh, stupid mistake of course.
After a few spins over 20m and 40m I heard a faint station and after a few of his CQ’s I decrypted that it was M0JRS, Jonathan from England! With shaky hands I send my call and he came back! Now I really start to sweat all over, of course I couldn’t make much of his message because I dropped letters left and right. But I did understand he send my RST and his name (which I already looked up on QRZ.com). When he finished transmitting I tried to send his RST and my name but it didn’t go so well. When I started to listen for his return, two other stations where interfering and I missed his message completely.
Nevermind, I logged him and it’s my first CW contact with hand!
So Jonathan: thank you very much for your patience and excuse me for my bad return, I’ll work hard to get better!
